JPH11291842A - Harness laying structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lay a harness connected to the wheel sensor of a front wheel along a front axle so as to prevent interference with a steering mechanism. SOLUTION: A harness 16 is laid along a recess 26 formed in the front face of a front axle 20, and covered with a cover 27 from its outer side. Also, the harness 16 is fixed to the inside of the cover 27 by a pressing plate spot-welded intermittently to the inside of the cover 27.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring structure of a harness, and more particularly to a wiring structure of a harness for wiring a harness to a front axle to which front wheels are steerably mounted at both ends thereof.

[0002]

2. Description of the Related Art In order to improve the braking performance and reliability of a vehicle, an antilock brake system (ABS), a brake overheat alarm, a lining and pad wear alarm, and the like are used. When such a device is used in a large vehicle, a harness connected to a wheel sensor of the front wheel for detecting state quantities such as rotation, temperature, and abrasion of the front wheel is arranged near the front axle. There is a need to. Therefore, conventionally, a harness is routed in a direction opposite to the traveling direction of the vehicle on the front axle, that is, in a recess opened rearward, and the state quantity detection sensor is connected to the tip of such a harness. Was.

[0003]

2. Description of the Related Art Generally, a steering mechanism is disposed behind a front axle of a vehicle such as a truck. Therefore, when the harness routed in the recess on the rear side of the front axle is pulled upward, the gap between the pulled-out harness and the components such as the link constituting the steering mechanism becomes small, and depending on the variation in assembly, There is a risk of harness interference or disconnection during steering, especially when turning inside.

Therefore, it is considered to arrange a harness in a recess in front of the front axle. However, the harness may be damaged by a jumped stone or the like, particularly when traveling on a rough road, and in some cases, the harness may be disconnected.

[0005] The present invention has been made in view of the above problems, and is a wiring harness that prevents interference with the steering mechanism or prevents damage due to gravel or the like during traveling. The purpose is to provide a structure.

[0006]

According to the present invention, there is provided a wiring structure for wiring a harness to a front axle having front wheels steerably mounted at both ends thereof, wherein the front axle is opened forward in the traveling direction of the vehicle. A harness routing structure, wherein a harness is routed in the recess and the harness is covered by a cover. Here, the harness may be connected to a sensor that detects state quantities such as rotation, temperature, and abrasion amount of the front wheels.

By arranging the harness in the recess in front of the front axle, interference with the steering mechanism and disconnection due to arranging the harness in the rear recess are prevented.
Moreover, it is possible to block off stones and the like that jump when the vehicle travels by the cover.

[0008]

FIG. 1 shows the structure of an ABS of a truck employing a harness routing structure according to an embodiment of the present invention.
The wheel sensors 13 and 14 are attached respectively, and the presence or absence of rotation of the front wheel 11 and the rear wheel 12 is detected by the wheel sensors 13 and 14. The wheel sensors 13 and 14 are respectively connected to a controller 15 via a harness 16. The controller 15 is connected to an ABS control valve 17 via a harness 16. ABS
The control valve 17 constitutes a valve for controlling the braking force on the front wheel 11 and the rear wheel 12.

Next, the wiring structure of the harness 16 connected to the wheel sensor 13 of the front wheel 11 will be described. The harness 16 is arranged along the front of the front axle 20, as shown in FIGS. As shown in FIGS. 2 and 3, the front axle 20 is integrally formed with connecting portions 21 each having a tubular shape at both ends thereof. Such a connecting portion 21 enables the knuckle 23 to be pivotable via the king pin 22. I support them. A wheel hub is rotatably mounted on a shaft protruding to the side of the knuckle 23 via a bearing, and a wheel of the front wheel 11 is fixed to the wheel hub via a hub bolt. .

A recess 26 is formed in the front axle 20 so as to open to the front side. Then, a cover 27 is mounted so as to cover such a concave portion 26. A seat 28 is formed at a predetermined position on the front side of the front axle 20, and an embedded bolt 29 is screwed to such a seat 28. The cover 27 is attached by such an embedded bolt 29. When the cover 27 is attached, the nut 31 is screwed to the tip of the bolt 29 from the outside of the cover 27.
The holding plate 30 is formed inside the cover 27 by spot welding.
The harness 16 arranged inside the cover 27 is pressed by such a holding plate 30.

FIG. 5 shows a case where the cover 27 is embedded
Harness 16 at the part pressed by 9
In this case, the harness 1 is fixed between the cover 27 and the presser plate 30 attached inside the cover 27.
6 is held. Here, the holding plate 30 is shown in FIG.
Has a substantially U-shaped cross section as shown in FIG. 5, and after the harness 16 is arranged, the pressing plate 30 is deformed so that the harness 16 is pressed against the inner surface of the cover 27. Therefore, the harness 16 is held while being sandwiched between the cover 27 and the holding plate 30.

The holding plate 30 is intermittently mounted not only at a position fixed by the embedding bolt 29 but also at an intermediate position between them. Figure 6 shows embedded bolt 2
Presser plate 3 attached at a position where 9 is not provided
0 is shown. The presser plate 30 has a substantially U-shaped cross section as described above, and is deformed later so as to press the harness 16 so that the harness 16 is sandwiched and held between the cover 27 and the presser plate 30. In the area inside the cover 27 where the holding plate 30 does not exist,
As shown in FIG. 7, the harness 16 is free of the cover 2
7 is routed inside.

As described above, in the present embodiment, when the harness 16 is arranged in the recess 26 on the front side of the front axle 20, the cover is provided on the front side of the front axle 20 to protect the harness 16 from stepping stones and gravel. 27 is attached, and this cover 27
As shown in the figure, the wiring bracket is also used. Here, the tip of the cover 27 is the front axle 2
There is a slight gap between the recess 26 and the recess 26. This is to prevent the cover 27 from being damaged when the gravel comes into contact with the cover 27 on a gravel road or the like, and prevents the tip of the cover 27 from coming into contact with the concave portion 26 of the front axle 20.

A female screw hole of a seat 28 into which an embedding bolt 29 for fixing the cover 27 is screwed is arranged on the neutral axis of the front axle 20. With such an arrangement, the weight of the front axle 20 is reduced. This is because if the female screw hole of the embedding bolt 29 is provided at a position shifted from the neutral axis, some reinforcement or build-up is required.

In order to secure the strength of the cover 27 at the vehicle-side rising portion of the harness 16, the cover 27 is made relatively thicker than the cover 27, thereby reducing the weight of the cover 27. The holding plate 30 is intermittently fixed to the inside of the cover 27 by spot welding, and the harness 16 is fixed to the cover 27.
By using this holding plate 30 for fixing
The height of the cover 27 can be reduced. In addition, since the holding plate 30 is provided inside the cover 27 even at a position where the cover 27 is fixed by the embedded bolt 29, it is possible to prevent the harness 16 from being damaged by the embedded bolt 29 at the time of assembly. Thereby, assemblability is improved.

As described above, according to the present embodiment, the cover 27 is attached to the outer portion of the concave portion 26 on the front side of the front axle 20, and the harness is routed inside the cover 27. Accordingly, it is possible to route the harness 16 while protecting the harness 16 from stepping stones and gravel. In addition, by arranging the harness 16 in front of the front axle 20, the harness 16 can be prevented from interfering with or disconnecting from the steering mechanism on the rear side of the front axle 20, or such interference or disconnection can be prevented. The man-hour for correction at the time of assembling for prevention can be reduced.

[0017]

As described above, according to the present invention, a recess is formed in the front axle so as to be opened forward in the traveling direction of the vehicle, a harness is routed in the recess, and the harness is covered by a cover. It is intended to be covered.

Accordingly, it is possible to prevent interference between the steering mechanism disposed on the rear side of the front axle and the harness, and to prevent the stepping stones and the like from damaging the harness with the cover.

According to the configuration in which the harness is connected to the sensor for detecting the state quantity of the front wheels, the harness connected to the sensor is arranged so as not to interfere with the steering mechanism and not to be damaged by stepping stones or the like. It becomes possible to search.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an ABS brake system.

FIG. 2 is a front view of a front axle.

FIG. 3 is an exploded perspective view showing wiring of a harness to the front axle.

FIG. 4 is an exploded perspective view showing attachment of a cover.

FIG. 5 is a longitudinal sectional view of the same.

FIG. 6 is a longitudinal sectional view showing wiring of a harness.

FIG. 7 is a longitudinal sectional view showing wiring of a harness.

[Explanation of symbols]

 Reference Signs List 11 front wheel 12 rear wheel 13 wheel sensor (front) 14 wheel sensor (rear) 15 controller 16 harness 17 ABS control valve 20 front axle 21 connecting portion 22 kingpin 23 knuckle 26 recess 27 cover 28 seat 29 embedded bolt 30 holding plate 31 nut 34 Case 35 Arm 36-38 Presser

Claims (2)

[Claims] 1. A wiring structure for arranging a harness on a front axle having front wheels steerably attached to both ends thereof, wherein a recess is formed in the front axle so as to be opened forward in a traveling direction of a vehicle. A harness routing structure, wherein a harness is routed in the recess, and the harness is covered by a cover. 2. The wiring structure for a harness according to claim 1, wherein said harness is connected to a sensor for detecting a state quantity of a front wheel.